On my truck a few years ago.
10w30 QSHM No API Rating, still have the bottle "SM Equivelent" has Mark Martin on the cover, Also had Slick 50 in it.
Supertech Oil Filter...
Figured Id give it a shot, this OC was like 13$, back when QSHM was 9.97 at Walmart, and a ST Filter was 2.97.
Good times, LOL.
I remember standing in the Auto Section at Walmart, and some lady was like "Castrol and Fram never failed me". Didnt know squat about the stuff, I was 17. I took the Fram filter out of the box and almost crushed it like a soda can. So I went with the Supertech.
The one after that was the old "New and Improved 15$" QSHM, w/o slick 50, and a Purolator 20195.
If I had to go back, I woulda stocked up on the QSHM w/ Slick 50, IDK I remember my truck loving the stuff.
Oh yeah, prior to this OC the only people to touch it were Ford, and my mums mechanic who was the last one to do the OC, at a 3000 mile interval, the oil he uses (Kendall 10w30) was like tar black, and the filter he uses (Napa Pro Choice) was rattling. Ah well. It was also about to rain, and the dang oil pan was like so tight, I had to run up to a mom and pop station because I stripped out the head to the bolt, with a good 45 minutes of banging a smaller socket on the head, it came off.. went home, did the OC in the rain, never any problems afterwards